UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                   WASHINGTON, D.C. 20549

                          FORM 8-K

                       CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange
Act of 1934

                     SEPTEMBER 22, 1999
                     ------------------
              (Date of earliest event reported)


         LABORATORY CORPORATION OF AMERICA HOLDINGS
         ------------------------------------------
   (Exact name of registrant as specified in its charter)


   DELAWARE              1-11353             13-3757370
   --------              -------             ----------
(State or other         (Commission         (IRS Employer
jurisdiction of         File Number)         Identification
incorporation)                               Number)


   358 SOUTH MAIN STREET, BURLINGTON, NORTH CAROLINA 27215
   -------------------------------------------------------
          (Address of principal executive offices)

                        336-229-1127
                        ------------
    (Registrant's telephone number, including area code)


ITEM 5. OTHER EVENTS On September 22, 1999, the Company issued a press release along with AHT Corporation, a healthcare e-commerce company, announcing an agreement whereby AHT will provide computer interfaces for the Company's reference laboratory, hospital, and managed care clients. The agreement provides for AHT to develop and install specific interfaces based on AHT's CDX-2- Trademark-technology, which allows the Company and its hospital partners to exchange laboratory results, demographics, eligibility information, and laboratory orders. ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS (c) Exhibit 20 Press release of the Company dated September 22, 1999.

SIGNATURES Pursuant to the requirements of the Securities and Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. LABORATORY CORPORATION OF AMERICA HOLDINGS ------------------------------------------ (Registrant) By:/s/ BRADFORD T. SMITH ------------------------------ Bradford T. Smith Executive Vice President, General Counsel, Secretary and Compliance Officer Date: October 4, 1999


FOR IMMEDIATE RELEASE

AHT Contact: Arthur Dague     LabCorp Contact: Pam Sherry
   (914) 524-4783                   (336) 584-5171
   adague@ahtech.com                sherryp@labcorp.com


      AHT CORPORATION AND LABCORP TO LINK LAB, HOSPITAL AND
                        MANAGED CARE DATA


TARRYTOWN, NY AND BURLINGTON, NC, SEPTEMBER  22 , 1999 - AHT
Corporation (Nasdaq: AHTC), a healthcare e-commerce company, and
Laboratory Corporation of America-Registered Trademark-Holdings
(LabCorp-Registered Trademark-) (NYSE: LH), one of the world's
largest clinical laboratories, announced today that they have
entered into an agreement whereby AHT will provide computer
interfaces for LabCorp's reference laboratory, hospital, and
managed care clients.  The agreement provides for AHT to develop
and install specific interfaces based on AHT's CDX-2-Trademark-
technology, which allows LabCorp and its hospital partners to
exchange laboratory results, demographics, eligibility
information, and laboratory orders.  Financial terms of the
agreement were not disclosed.

 "Building a cooperative data management network is directly in
line with LabCorp's Internet strategy to improve information flow
through the use of innovative technologies," said Stevan R.
Stark, Executive Vice President of LabCorp. "LabCorp selected AHT
for its depth of experience in complex multi-laboratory
interfacing. Their CDX-2 technology enables LabCorp to serve the
network management needs of managed care customers, working with
our hospital and reference laboratory partners."  The AHT
relationship is a key component of LabCorp's global strategy for
network management services.

CDX-2 provides a Microsoft NT-based platform to rapidly develop
and operate interfaces between and among information systems in
ambulatory physician offices, reference laboratories and
hospitals.  CDX-2 enables the integration of multiple
institutions and services in a high-speed transactional
environment.

Jon Edelson, MD, Chairman, CEO and President of AHT, said, "AHT
is very pleased to have been selected by LabCorp to provide these
interfaces.  We believe that our experience combined with the CDX-
2 technology will allow LabCorp to meet the marketplace's demands
for increasingly complex business relationships between certain
of its partner hospitals and reference laboratories."

Laboratory Corporation of America-Registered Trademark- Holdings(LabCorp-Registered Trademark-) is a national clinical laboratory with annual revenues of $1.6 billion in 1998. With 18,400 employees and over 100,000 clients nationwide, the company offers more than 2,000 clinical tests, ranging from simple blood analyses to more sophisticated technologies. Included in LabCorp's network of 25 major laboratories are three Centers of Excellence. The Center for Molecular Biology and Pathology, in Research Triangle Park (RTP), North Carolina, develops applications for polymerase chain reaction (PCR) technology. Its Center for Occupational Testing in RTP is the world's largest substance abuse testing facility, and the Center for Esoteric Testing in Burlington, North Carolina, performs the largest volume of rare analyses in the network. LabCorp's clients include physicians, state and federal governments, managed care organizations, hospitals, clinics, pharmaceutical and Fortune 1000 companies, and other clinical laboratories. Visit LabCorp's web site at www.labcorp.com. AHT Corporation (Nasdaq: AHTC) participates in the growing healthcare e-commerce market. The Company provides information technology enabling the electronic management of laboratory and prescription transactions. AHT's goal is to be a leading provider of Internet-based clinical e-commerce among physicians and healthcare organizations. Visit AHT's website at www.ahtech.com. ### This press release contains forward-looking information regarding AHT Corporation and Laboratory Corporation of America Holdings. The forward-looking statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements, including statements as to industry trends, future economic performance, anticipated profitability, anticipated revenues and expenses, and products or service line growth may be significantly impacted by certain risks and uncertainties, including, but not limited to, failure of the clinical e-commerce industry to develop at anticipated rates, failure of the Companies' clinical information technology products and services to gain significant market acceptance, competition and other economic factors. These forward-looking statements speak only as of the date hereof, and the Companies disclaim any intention or obligation to update these forward- looking statements in the future. Additional risks and uncertainties are described in the Companies' public filings with the Securities and Exchange Commission.